<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May 28, 2019, 8:29 AM Bernd Bausch <<a href="mailto:berndbausch@gmail.com">berndbausch@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p>Thanks for clarifying this Erik. Let me point out then that the
release notes [1] are worded rather unequivocally, and what you
are saying contradicts them:</p>
<blockquote>
<p>RBD driver has added multiattach support. It should be noted
that replication and multiattach are mutually exclusive, so a
single RBD volume can only be configured to support one of these
features at a time. Additionally, RBD image features are not
preserved which prevents a volume being retyped from multiattach
to another type. This limitation is temporary and will be
addressed soon.</p>
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<p>Bernd.<br></p></div></blockquote></div></div><div dir="auto">I haven't even looked at Stein yet so I could be wrong, but I thin this is referring to replication like RBD mirroring. There's still an issue in Ceph, as far as I know, where ceph's object replication would have a problem with multi-attach. I haven't come across any Ceph release note to say this has been addressed.</div><div dir="auto"><br></div><div dir="auto">Hopefully someone from the Cinder team can straighten us out. </div><div dir="auto"><br></div><div dir="auto">-Erik</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div text="#000000" bgcolor="#FFFFFF"><p>
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<p>On 5/28/2019 11:30 AM, Erik McCormick wrote:</p>
<blockquote type="cite">There
isn't really a Ceph multi-attach feature using Cinder</blockquote>
<p>[1] <a class="m_3870466538182828169moz-txt-link-freetext" href="https://docs.openstack.org/releasenotes/cinder/stein.html" target="_blank" rel="noreferrer">https://docs.openstack.org/releasenotes/cinder/stein.html</a><br>
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